<template>
  <section class="todoapp">
    <hm-header @add-event="handleAdd"></hm-header>
    <hm-main
      :list="showList"
      @delete-event="handleDelete"
      @change-status-event="changeStatus"
      @change-all-event="handleAll"
    ></hm-main>
    <hm-footer
      :list="list"
      @clearall-event="clearAll"
      :status="status"
      @status-event="status = $event"
    ></hm-footer>
  </section>
</template>

<script>
const obj = {
  "#/": "all",
  "#/completed": "done",
  "#/active": "undone",
};
import HmHeader from "./components/hm-header.vue";
import HmMain from "./components/hm-main.vue";
import HmFooter from "./components/hm-footer.vue";
export default {
  components: {
    HmHeader,
    HmMain,
    HmFooter,
  },
  data() {
    return {
      list: JSON.parse(window.localStorage.getItem("list")) || [],
      status: obj[location.hash] || 'all', 
    };
  },
  methods: {
    handleDelete(id) {
      const index = this.list.findIndex((item) => item.id === id);
      this.list.splice(index, 1);
    },
    changeStatus(id) {
      const obj = this.list.find((item) => item.id === id);
      obj.done = !obj.done;
    },
    handleAdd(name) {
      const id = this.list.length === 0 ? 1 : this.list.slice(-1)[0].id + 1;
      const obj = {
        id,
        name,
        done: false, 
      };
      this.list.push(obj);
    },
    handleAll(value) {
 
      this.list = this.list.map((item) => {
        item.done = value;
        return item;
      });
    },
    clearAll() {
      this.list = this.list.filter((item) => item.done === false);
    },
  },
  computed: {
    showList() {
      if (this.status === "all") {
        return this.list;
      } else if (this.status === "done") {
        return this.list.filter((item) => item.done === true);
      } else {
        return this.list.filter((item) => item.done === false);
      }
    },
  },
  watch: {
    list: {
      handler(newValue) {
        window.localStorage.setItem("list", JSON.stringify(newValue));
      },
      deep: true,
    },
  },
};
</script>

<style></style>
